Two more prominent sports figures pulled out of the Olympics in Rio de Janeiro on Saturday because of Zika virus concerns.
Reigning Olympic tennis doubles champions Bob and Mike Bryan will not represent Team USA at the 2016 Summer Games. Rio events begins Aug. 5.
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"After countless hours of deliberation, Mike and I have decided to forego the Rio Olympics," Bob Bryan said Saturday in a statement to The Washington Post. "Though we'd love to compete again, as husbands and fathers, our family's health is now our top priority.
"Representing Team USA is one of our proudest tennis moments to date and winning gold in 2012 will always remain the pinnacle of our career. …We wish every athlete luck in their quest for Olympic glory and hope the Rio Games are a positive experience for everyone involved.
"Our wives were involved, our parents were involved and it's the toughest decision we've probably ever made, but ultimately we feel better about it."
It's a major loss for U.S. tennis. The brothers are the most decorated men's tennis duo of all time. American men's singles players John Isner and Sam Querrey also withdrew from the Olympics to focus on the U.S. Open.
Zika, a virus carried by mosquitos, is known to birth defects when babies are born to women positive for the virus. Men can also sexually transmit the virus to their partners.